Tb/s Optical Logic Gates Based on Quantum-Dot Semiconductor Optical Amplifiers

Rostami, Ali; Nejad, H. Baghban Asghari; Qartavol, R.M.; Saghai, H. Rasooli

doi:10.1109/jqe.2009.2033253

Cited by 103 publications

(70 citation statements)

References 27 publications

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“…The simulation results and their comparison to the results of other papers verify this method. It was found that our method can solve rate equations more quickly than previous methods [18,19]. The extinction ratio of the input signals was assumed to be 10 dB.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…The extinction ratio of the input signals was assumed to be 10 dB. The parameter values were taken from the literature on other QD-SOA-based interferometric gates [19][20][21][22]. These are: In order to assess the performance of an optical logic design, the most important parameters are extinction ratio, amplitude modulation, quality factor, pseudo-eye diagram, and relative eye opening, which we will investigate.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…SOA with quantum-dot active region is a promising candidate for ultrafast operations [14][15]. The high output power, low threshold current density, ultra-fast response behavior, good temperature stability, and low noise level of the quantum-dot SOA (QD-SOA) have been demonstrated, and it has been emphasized that these elements can be utilized as building blocks of alloptical systems [17][18][19]. In this paper, using two QD-SOA MZI, we design a subtractor that can operate and perform well at speeds of over 250 Gb/s.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance Analysis of a High-Speed All-Optical Subtractor using a Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Salehi¹,

Taherian²

2014

Journal of the Optical Society of Korea

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This paper presents the simulation and design of an all-optical subtractor using a quantum-dot semiconductor optical amplifier Mach-Zehnder interferometer (QD-SOA MZI) structure consisting of two cascaded switches, the first of which produces the differential bit. Then the second switch produces the borrow bit by using the output of the first switch and the subtrahend data stream. Simulation results were obtained by solving the rate equations of the QD-SOA. The effects of QD-SOA length, peak power and current density have been investigated. The designed gate can operate at speeds of over 250 Gb/s. The simulation results demonstrate a high extinction ratio and a clear and wide-opening eye diagram.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance Analysis of a High-Speed All-Optical Subtractor using a Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Salehi¹,

Taherian²

2014

Journal of the Optical Society of Korea

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“…Both theoretical and experimental studies have proven the unique capabilities of these devices. Ultrafast gain recovery [14], low noise gure of 3.5 dB [5], high saturated output power [57], pattern-eect free XGM--based wavelength conversion up to 160 Gbits/s [8], and capability of operation at Tbits/s speeds in presence of a control signal [9] are among these capabilities.…”

Section: Introductionmentioning

confidence: 99%

“…Theoretical studies have proven distinctive superiorities of optically pumped QD-SOAs (OP-QDSOAs) over their conventional counterparts, i.e. EP-QDSOAs [9,10]. Based on these studies, the gain and phase recovery time in an OP-QDSOA can be much less than that in an EP-QDSOA.…”

Section: Introductionmentioning

confidence: 99%

Sub-Nanosecond Phase Recovery in Quantum-Dot Semiconductor Optical Amplifiers

Abedi

Taleb

2013

Acta Phys. Pol. A

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In this paper, optimal design of a pumping scheme for achieving the best gain and phase response in quntum--dot semiconductor optical ampliers is investigated. For the rst time, the dynamic response of the quntum-dot semiconductor optical amplier is evaluated under three dierent pumping schemes, known as optical pumping, electrical pumping, and electro-optical pumping. Simulation results show that the shortest gain recovery time in quntum-dot semiconductor optical ampliers can be achieved under the electrical pumping scheme. However, under the optical pumping and electro-optical pumping schemes, the quntum-dot semiconductor optical amplier represents a shorter phase recovery compared to the electrical pumping scheme. We found that a sub-nanosecond phase recovery in the quntum-dot semiconductor optical amplier can be achieved under the OP and electro--optical pumping schemes, which can never be achieved under the electrical pumping, because of the slow carrier dynamics of the carrier reservoir. Also, it was found that the gain recovery process in an optically pumped quntum-dot semiconductor optical amplier can be signicantly accelerated at cryogenic temperatures. This result demonstrates the superiorities of the optical pumping scheme over the electrical pumping and electro-optical pumping schemes at low temperatures, where both the gain and phase recovery times of an optically pumped quantum-dot semiconductor optical amplier are drastically decreased.

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All‐Optic Logical Operations Based on the Visible‐Near Infrared Bipolar Optical Response

You,

Han,

Zhang

et al. 2024

Advanced Science

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The burgeoning need for extensive data processing has sparked enthusiasm for the development of a novel optical logic gate platform. In this study, junction field‐effect phototransistors based on molybdenum disulfide/Germanium (MoS2/Ge) heterojunctions are constructed as optical logic units. This device demonstrates a positive photoresponse that is attributed to the photoconductivity effect occurring upon irradiation with visible (Vis) light. Under the illumination of near‐infrared (NIR) optics with wavelengths within the communication band, the device shows a negative photoresponse, which is associated with the interlayer Coulomb interactions. The current state of the device can be effectively modulated as different logical states by precisely tuning the wavelength and power density of the optical. Within a 3 × 3 MoS2/Ge phototransistor array, five essentially all‐optical logic gates (“AND,” “OR,” “NAND,” “NOT,” and “NOR”) can be achieved in every signal unit. Furthermore, three complex all‐optical logical operations are demonstrated by integrating two MoS2/Ge phototransistors in series. Compared to electronic designs, these all‐optical logic devices offer a significant reduction in transistor number, with savings of 50–94% when implementing the above‐mentioned functions. These results present opportunities for the development of photonic chips with low power consumption, high fidelity, and large volumes.

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Tb/s Optical Logic Gates Based on Quantum-Dot Semiconductor Optical Amplifiers

Cited by 103 publications

References 27 publications

Performance Analysis of a High-Speed All-Optical Subtractor using a Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Performance Analysis of a High-Speed All-Optical Subtractor using a Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Sub-Nanosecond Phase Recovery in Quantum-Dot Semiconductor Optical Amplifiers

All‐Optic Logical Operations Based on the Visible‐Near Infrared Bipolar Optical Response

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